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/*
* Copyright (C) 2011 Martin Willi
* Copyright (C) 2011 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "informational.h"
#include <daemon.h>
#include <sa/ikev1/tasks/isakmp_delete.h>
#include <sa/ikev1/tasks/quick_delete.h>
#include <encoding/payloads/delete_payload.h>
typedef struct private_informational_t private_informational_t;
/**
* Private members of a informational_t task.
*/
struct private_informational_t {
/**
* Public methods and task_t interface.
*/
informational_t public;
/**
* Assigned IKE_SA.
*/
ike_sa_t *ike_sa;
/**
* Notify payload to send
*/
notify_payload_t *notify;
/**
* Delete subtask
*/
task_t *del;
};
METHOD(task_t, build_i, status_t,
private_informational_t *this, message_t *message)
{
message->add_payload(message, &this->notify->payload_interface);
this->notify = NULL;
return SUCCESS;
}
METHOD(task_t, process_r, status_t,
private_informational_t *this, message_t *message)
{
enumerator_t *enumerator;
delete_payload_t *delete;
notify_payload_t *notify;
notify_type_t type;
payload_t *payload;
status_t status = SUCCESS;
enumerator = message->create_payload_enumerator(message);
while (enumerator->enumerate(enumerator, &payload))
{
switch (payload->get_type(payload))
{
case NOTIFY_V1:
notify = (notify_payload_t*)payload;
type = notify->get_notify_type(notify);
if (type == INITIAL_CONTACT_IKEV1)
{
this->ike_sa->set_condition(this->ike_sa,
COND_INIT_CONTACT_SEEN, TRUE);
}
else if (type == UNITY_LOAD_BALANCE)
{
host_t *redirect, *me;
chunk_t data;
data = notify->get_notification_data(notify);
redirect = host_create_from_chunk(AF_INET, data,
IKEV2_UDP_PORT);
if (redirect)
{ /* treat the redirect as reauthentication */
DBG1(DBG_IKE, "received %N notify. redirected to %H",
notify_type_names, type, redirect);
/* Cisco boxes reject the first message from 4500 */
me = this->ike_sa->get_my_host(this->ike_sa);
me->set_port(me, IKEV2_UDP_PORT);
this->ike_sa->set_other_host(this->ike_sa, redirect);
this->ike_sa->reauth(this->ike_sa);
enumerator->destroy(enumerator);
return DESTROY_ME;
}
else
{
DBG1(DBG_IKE, "received %N notify, invalid address");
}
}
else if (type < 16384)
{
DBG1(DBG_IKE, "received %N error notify",
notify_type_names, type);
if (this->ike_sa->get_state(this->ike_sa) == IKE_CONNECTING)
{ /* only critical during main mode */
status = FAILED;
}
break;
}
else
{
DBG1(DBG_IKE, "received %N notify",
notify_type_names, type);
}
continue;
case DELETE_V1:
if (!this->del)
{
delete = (delete_payload_t*)payload;
if (delete->get_protocol_id(delete) == PROTO_IKE)
{
this->del = (task_t*)isakmp_delete_create(this->ike_sa,
FALSE);
}
else
{
this->del = (task_t*)quick_delete_create(this->ike_sa,
PROTO_NONE, 0, FALSE, FALSE);
}
}
break;
default:
continue;
}
break;
}
enumerator->destroy(enumerator);
if (this->del && status == SUCCESS)
{
return this->del->process(this->del, message);
}
return status;
}
METHOD(task_t, build_r, status_t,
private_informational_t *this, message_t *message)
{
if (this->del)
{
return this->del->build(this->del, message);
}
return FAILED;
}
METHOD(task_t, process_i, status_t,
private_informational_t *this, message_t *message)
{
return FAILED;
}
METHOD(task_t, get_type, task_type_t,
private_informational_t *this)
{
return TASK_INFORMATIONAL;
}
METHOD(task_t, migrate, void,
private_informational_t *this, ike_sa_t *ike_sa)
{
this->ike_sa = ike_sa;
}
METHOD(task_t, destroy, void,
private_informational_t *this)
{
DESTROY_IF(this->notify);
DESTROY_IF(this->del);
free(this);
}
/*
* Described in header.
*/
informational_t *informational_create(ike_sa_t *ike_sa, notify_payload_t *notify)
{
private_informational_t *this;
INIT(this,
.public = {
.task = {
.get_type = _get_type,
.migrate = _migrate,
.destroy = _destroy,
},
},
.ike_sa = ike_sa,
.notify = notify,
);
if (notify)
{
this->public.task.build = _build_i;
this->public.task.process = _process_i;
}
else
{
this->public.task.build = _build_r;
this->public.task.process = _process_r;
}
return &this->public;
}
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